Effects of seed dresser application to obtain healthy seeds and crops of winter cereals under conditions of Belarus
Keywords:: winter wheat, winter triticale, fungicides, snow mold, root rot, infection, disease severity, biological efficacy
Long-term data (2010–2018) of investigation of the role of fungicides in protection of winter cereals crops against diseases in the Republic of Belarus are given. The efficacy of fungicides including systemic and contact compounds against the snow mold, the most harmful disease in the Republic, was estimated during the periods of outbreaks, low and moderate severity of the disease. Root rot severity was observed at moderate level. Phytopathological analysis of winter wheat and triticale seeds showed high prevalence of genera Fusarium and Alternaria. Biological efficacy of fungicides against seed contamination varied from 78.8 to 100 % against Fusarium and from 73.3 to 99.9 % against Alternaria depending on the fungicide and crop. It was shown that fungicides containing fludioxonil or prochloraz were more effective against seeds contamination and snow mold severity. The maximum biological efficacy of fungicides reached 60.2 % and 66.9 % for protection of winter wheat and winter triticale, respectively. Fungicide seed treatment in periods of snow mold outbreaks allowed to save up to 38.1 c/ha of winter wheat grain and up to 29.5 c/ha of winter triticale.
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